<template>
  <div class="login_container">
    <div class="login_box">
      <div class="avater_box">
        <img src="../assets/logo.png" />
      </div>
      <el-form ref="loginFormRef" class="login_form" :model="loginForm" :rules="loginFormRules">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="iconfont icon-3702mima"
            type="password"
          ></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="loginCheck">登录</el-button>
          <el-button type="info" @click="loginReset">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data: function() {
    return {
      // 设置绑定数据
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 验证规则
      loginFormRules: {
        // 用户名是否合法
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        // 密码是否合法
        password: [
          { required: true, message: '请输入用户密码', trigger: 'blur' },
          { min: 6, max: 12, message: '长度在 6 到 12 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 表单重置
    loginReset: function() {
      console.log(this)
      this.$refs.loginFormRef.resetFields()
    },
    // 预验证
    loginCheck: function() {
      this.$refs.loginFormRef.validate(async valid => {
        // 验证返回结果为false 则直接退出
        if (!valid) return
        // 接收请求后返回得数据
        const { data: res } = await this.$http.post('login', this.loginForm)
        // 通过判断状态码，弹出登录信息
        if (res.meta.status !== 200) {
          return this.$message.error('登录失败，请重试！')
        }
        this.$message.success('登录成功！')
        console.log(res)
        // 将登录成功后的 token，保存到客户端的sessionstorage中
        // 请求返回的数据中有token信息
        window.sessionStorage.setItem('token', res.data.token)
        // 通过编程式导航跳转到后台页面
        this.$router.push('home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background: #2b4b6b;
  height: 100%;
}
.login_box {
  position: absolute;
  width: 450px;
  height: 300px;
  background-color: #fff;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avater_box {
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      height: 100%;
      width: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}
.login_form {
  width: 100%;
  position: absolute;
  bottom: 0;
  padding: 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
